This alien vine has been widely planted and escaped in southeastern states (FNA 3). It spreads vegetatively with running roots, persisting in abandoned gardens; spread from seed has been suggested but perhaps not proven (CW). The species can become somewhat woody and semi-evergreen, but in Ky. these features are restricted to more sheltered sites. Its foliage may be avoided by deer and other mammalian herbivores, partly due to its acrid taste.